Helen is a 73 year old woman who sustained a right hip fract…

Helen is a 73 year old woman who sustained a right hip fracture due to a fall at home.  She is now partial weight bearing (PWB) on the right lower extremity and is being treated in the skilled nursing facility where you work.  She has decreased coordination (which likely led to her fall) and Diabetes Mellitus. She had a mild myocardial infarct eight years ago and is on 2 Liters of oxygen. Helen is on supplemental oxygen.  Which of the following pieces of equipment delivers the oxygen to Helen?